jetpac.nes/src/jetpac.s, branch mainPort to the NES/Famicom of "Jetpac" from Ashby Computers and Graphics Limited.
https://git.mssola.com/nes/jetpac.nes/atom?h=main2026-04-13T14:34:11ZAdd sound effects2026-04-13T14:34:11ZMiquel Sabaté Solàmssola@mssola.com2026-04-13T14:34:11Zurn:sha1:aef156ac6216ed157b06a2872ba051af43317e93
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Use the new asan:stack statement2026-04-08T14:10:41ZMiquel Sabaté Solàmssola@mssola.com2026-04-08T14:10:41Zurn:sha1:c3c6f3b4469bf9eadff5763fa16dbbbf15637e57
This allows us to account for the stack on the memory report. Using half
of the $100 page for stack management is most surely overblown, but I
have not really computed how much we are using the stack on this game,
even if I suspect that its usage is actually pretty minimal. Anyways, we
have room to spare in RAM space, so let's reserve half a page for the
stack.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Fix bogus comments2026-04-06T19:52:29ZMiquel Sabaté Solàmssola@mssola.com2026-04-06T19:52:29Zurn:sha1:a26d621b1f6157f742ecd40e5ad7c4636a855d83
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Cycle the kind of shuttle to be used2026-04-02T12:40:12ZMiquel Sabaté Solàmssola@mssola.com2026-04-02T12:40:12Zurn:sha1:cb1111055f7b03989daac63675d27bfd156a4e21
In preparation to having multiple kinds of shuttles as in the original
game, introduce the 'Globals::zp_shuttle_kind' variable, which is just a
helper value by masking out the 'Globals::zp_level' variable. This in
turn will be the index for selecting which tile IDs for each shuttle
part.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Add a small signature in ROM space2026-04-02T05:04:33ZMiquel Sabaté Solàmssola@mssola.com2026-04-02T05:04:33Zurn:sha1:1272d402ce2651e4e3966ecd2af2417eea66b0a3
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Save the high score after game over2026-03-27T09:48:53ZMiquel Sabaté Solàmssola@mssola.com2026-03-25T22:44:29Zurn:sha1:63939a5c86c5678347f41f877e562b58236782df
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Update scores on screen2026-03-25T21:40:48ZMiquel Sabaté Solàmssola@mssola.com2026-03-25T21:40:48Zurn:sha1:63ef73de3bdd698ab250407354e24a6de7c9ef20
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Add support for adding scores2026-03-25T00:03:17ZMiquel Sabaté Solàmssola@mssola.com2026-03-25T00:03:17Zurn:sha1:ccf320971efe9b11f7b7722b2ee2642a10303203
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Try to initialize enemies on unique Y coordinates2026-03-22T14:17:24ZMiquel Sabaté Solàmssola@mssola.com2026-03-20T20:52:36Zurn:sha1:fb23cf51040f06bfcfbaf318d7b452d76ffbedfb
That is, our PRNG algorithm is so stupid that sometimes it cycles into
the same value multiple times. While play testing, sometimes we were so
unlucky that we got all enemies on the same Y screen coordinate.
As funny as these situations can be, this shouldn't happen, so I have
introduced an (awesomely named) function that makes a harder effort at
finding a unique random number.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Push the value from Over::handle() to the stack2026-03-20T14:16:35ZMiquel Sabaté Solàmssola@mssola.com2026-03-20T14:16:35Zurn:sha1:606bd95503e3c3caf61c90f48271c41651bdc937
Setting 'Globals::zp_tmp0' with it is potentially dangerous given how
volatile this temporary memory address is.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>